The blown gate draws a clipped pixel at its own maximum -- one value across
the three channels, so the frame's highlights carry no cast -- but the
per-channel tone curve runs after it and re-tints what the gate had just
made neutral. One cubic a channel, fitted on a grid that has no block left
to fit where the frame ran out (previewMatch drops the fully blown ones),
so at the plateau the three curves agree only at 1.0 and part company
either side of it.
On the ORF this was reported on, the moonlit sky came back 254,255,255 and
253,255,254 -- red under green across a quarter of the frame.
The gate is the develop's own statement that the pixel had no colour of its
own, so it is re-read on the value that leaves the shader. The blown pixels
now measure 254.95,254.94,254.97 (R/G 1.0000) against 253.44,254.94,254.51
(0.9941) before; their two most common triples, 254,255,255 at 149315 and
253,255,254 at 122127, collapse to 255,255,255 at 278099. The bright bands
land at -0.0,-0.0,-0.0 against the embedded preview where they were
-2.1,-0.0,-1.0, and midtones and the lower half are untouched.
3dtours
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